A system and method is provided to provide information services to a plurality of mobile clients where the mobile clients can be any networked device including cell-phones, PDAs and other wireless devices. The system utilizes available communications protocols to submit requests and receive responses that can be information services and mobile content, such as ring tones and wallpaper. The system permits a user to conduct unstructured searches and to use hierarchical navigation systems for generating content-specific structured search queries and datasets. Searches can be based on a prior history of searches, geographical location, stated preferences and profile information associated with the user.